Japan's Kosuke Hagino was quickest in the men's 200m individual medley heats as the defending champ posted a time of 1:59.76, with Chinese pair Qin Haiyang and Wang Shun in close pursuit.

"The starter was a bit urgent with his 'ready, set, go' so I didn't get a good start," said Hagino, who captured 400 IM gold at the Rio Olympics two years ago and took silver behind Michael Phelps in the 200m.